Xylem IM125 R02 RJA & RJDS Quick Set - Manual (Page 10)

10
Section 7 Pressure Tanks
and Piping
Standard Pressure Tank
When a pump is used with a standard pressure tank, it must
be connected to the tank using standard fittings. A rubber
isolator hose should be connected between the pump and
the tank to reduce noise and vibration transmission. Set
the tank on bricks to avoid condensation beneath the tank.
Install a union and a gate valve between the pump and tank
for servicing. Install an air volume control in the tank tapping
and connect ¼" tubing to the pump. (Figure 12.)
Replacing a Standard Tank With a
Pre-Charged Air Tank
Many times a defective steel tank must be replaced with a
pre-charged air tank to provide effective system protection.
Figure 13 should be followed for correct connection to the
system.
Because a pre-charged air tank is precharged with air, it will
always occupy less space than a standard tank for similar
amounts of pressurized water. Be sure to plug the air port on
a jet pump, as it is no longer necessary to supply air to the
tank.
Adjusting Pre-Charged Tank To
System Requirements
Pre-charged tanks are shipped with a standard precharge of
38 PSI. The precharge should be adjusted according to the
installation instructions packed with the tank.
AIR VOLUME CONTROL
GATE VALVE
ISOLATOR HOSE
UNION
STD. GALVANIZED
PRESSURE TANK
VALVE
"T" MANUAL
REGULATING
VALVE
UNION
GATE VALVE
PRE-CHARGED
AIR TANK
ISOLATOR
HOSE SERVICE
LINE
SUCTION
PIPE
DRIVE PIPE
TO SYSTEM
SHUT-OFF
VALVE
RELIEF
VALVE
SUCTION
PIPE
PUMP STAND
DRAIN
TO SYSTEM
SHUT-OFF VALVE
PRESSURE
SWITCH
PUMP STAND
DRAIN
OPTIONAL
LOCATION
FOR PRESSURE
SWITCH
UNION
PRE-CHARGED AIR TANK
STANDARD PRESSURE TANK
FIGURE 14
FIGURE 15
FIGURE 13 FIGURE 12
CENTRIPRO
TANK
CENTRIPRO
TANK
SUCTION PIPE
AIR VOLUME
CONTROL
CONNECTION